BIO 200 FINAL EXAM QUESTIONS WITH VERIFIED
ANSWERS
Which of the tree tips indicate the group that includes humans?
a. 2 (Animalia)
b. 3 (Eumetazoa)
c. 4 (Bilateria)
d. 5 (After Bilateria)
e. None of the groups include humans - Answers - d. 5
Which of the following characteristics is the MOST DERIVED trait listed below that is
also shared by the taxa in groups 4 (Bilateria) and 5 (After Bilateria)?
a. True Tissures
b. Cephalization
c. Ectoderm and Endoderm
d. Collagen
e. Multicellularity - Answers - b. Cephalization
What is the group indicated by "1" (before Animalia)?
a. Choanoflagellates
b. Porifera
c. Cnidarians
d. Ctenophores
e. Craniates - Answers - a. Choanoflagellates
Which of the following groups colonized land?
a. Molluscs
b. Crustaceans
c. Arthropods
d. Sarcopterygii
e. All of the above - Answers - e. All of the above
Someone hands you a snake-like critter they pulled out of the ocean. You notice
immediately that it is lacking a lower jaw (lacking it naturally; it is not horribly injured),
has vertebral elements on a cartilaginous notochord, and appears to feed by attaching
keratinous teeth to the side of other creatures. Identify the most specific group (the
group that contains the fewest number of species) listed below that this critter belongs
to.
a. Chordata
b. Craniata
c. Vertebrata
d. Gnathostomes
e. Osteichthys - Answers - c. Vertebrata
,Which of the following adaptations assisted tetrapods MOST in their colonization of
land?
a. Amniotic eggs
b. Pharyngeal silts
c. Ray-finned appendages
d. Cartilaginous vertebrae
e. Placenta - Answers - a. Amniotic eggs
Biologists generally only name groups that have a single common ancestor. "Animalia",
"Bilateria", and "Ecdysozoa" are all good examples. The terms used by non-
professionals certainly don't stick to this rule. "Fish" is a good example. Most people
would consider both sharks and salmon as fish. If we were to call everything that arose
from the common ancestor of sharks and salmon as "fish", which of the following would
also need to be known as a fish?
a. Starfish (an Echinoderm)
b. Jellyfish (a Cnidarian)
c. Turtles (a Reptile)
d. Hagfish (a myxini Craniate)
e. Lamprey (a Petromyzontid) - Answers - c. Turtles (a Reptile)
Lamprey are Vertebrates but not Gnathostomes because they...
a. have keratinous teeth.
b. have filter-feeding larvae.
c. lack vertebrae of calcified bone.
d. are parasitic.
e. are jawless. - Answers - e. are jawless.
Each of the answers below gives a different group of animals (in CAPS), a characteristic
that at least one member of the group has (in italics), and the evolutionary history of that
characteristic (derived or ancestral in parentheses). Choose the answer that correctly
matches the evolutionary history of the character for that group.
a. PRIMATES --> hairless faces (ancestral)
b. BILATERIA --> bilaterally symmetrical body plan (ancestral)
c. ANIMALIA --> HOX genes (derived)
d. EUMETAZOANS --> ecdysis (ancestral)
e. EUMETAZOANS --> tissues (derived) - Answers - b. BILATERIA --> bilaterally
symmetrical body plan (ancestral)
A marine biologist discovers a new deep-sea organism. Which of the following sets of
characteristics would tell you that the organism MUST be an animal. It is a/n...
a. multi-cellular, eukaryotic organism with chitin
b. multi-cellular, eukaryotic, diploid organism
c. organism with tissues and 2 primary embryonic layers
d. haploid organism with HOX genes that produces gametes
e. unicellular organism with collagen - Answers - c. organism with tissues and 2 primary
embryonic layers
, In animal development, which of the following processes results in the formation of an
endoderm and ectoderm layer?
a. Cleavage
b. Gastrulation
c. Fertilization
d. Mesodermal formation
e. The "eight-cell" stage - Answers - b. Gastrulation
Choose the correct matching of animal groups with their body symmetry.
a. Porifera = radial; Cnidaria = radial; Ecdysozoa = bilaterial
b. Porifera = assymetrical; Ctenophore = bilateral; Ecdysozoa = radial
c. Porifera = assymetrical; Lophotrochozoa = radial; Ecdysozoa = bilaterial
d. Porifera = assymetrical; Lophotrochozoa = bilaterial; Ecdysozoa = bilaterial
e. Ctenophore = assymetrical; Cnidaria = radial; Ecdysozoa = bilaterial - Answers - d.
Porifera = assymetrical; Lophotrochozoa = bilaterial; Ecdysozoa = bilaterial
The classification of the common housefly is:
Eukarya-Animalia-Arthropoda-Insecta-Diptera-Muscidae-Musca-domestica
While the classification of one bumblebee is:
Eukarya-Animalia-Arthropoda-Insecta-Hymenoptera-Apidae-Bombus-pensylvanicus
These two organisms are in different...
a. Domains.
b. Orders.
c. Classes.
d. Phyla.
e. Families - Answers - b. Orders.
Which of the following is true of the generic phylogenetic tree depicted below, where the
right end depicts most recent time.
a. Each node represents an actual time in history.
b. Group A and C are most closely related.
c. The common ancestor at the rightmost node existed more recently than the one to its
left.
d. Group C is likely the common ancestor of Groups A and B.
e. A and B represent one species. - Answers - c. The common ancestor at the rightmost
node existed more recently than the one to its left.
The traditional three- or five-Kingdom phylogenetic classifications of life has been
modified with a three-Domain system because...
a. unicellular organisms are either prokaryotic or eukaryotic.
b. Fungi, Animals, and Plants share a recent common ancestor.
c. Animals are more closely related to Archaea than to Plants.
d. There is no single common ancestor to life on the planet.
e. multicellular organisms are all eukaryotic. - Answers - a. unicellular organisms are
either prokaryotic or eukaryotic.
ANSWERS
Which of the tree tips indicate the group that includes humans?
a. 2 (Animalia)
b. 3 (Eumetazoa)
c. 4 (Bilateria)
d. 5 (After Bilateria)
e. None of the groups include humans - Answers - d. 5
Which of the following characteristics is the MOST DERIVED trait listed below that is
also shared by the taxa in groups 4 (Bilateria) and 5 (After Bilateria)?
a. True Tissures
b. Cephalization
c. Ectoderm and Endoderm
d. Collagen
e. Multicellularity - Answers - b. Cephalization
What is the group indicated by "1" (before Animalia)?
a. Choanoflagellates
b. Porifera
c. Cnidarians
d. Ctenophores
e. Craniates - Answers - a. Choanoflagellates
Which of the following groups colonized land?
a. Molluscs
b. Crustaceans
c. Arthropods
d. Sarcopterygii
e. All of the above - Answers - e. All of the above
Someone hands you a snake-like critter they pulled out of the ocean. You notice
immediately that it is lacking a lower jaw (lacking it naturally; it is not horribly injured),
has vertebral elements on a cartilaginous notochord, and appears to feed by attaching
keratinous teeth to the side of other creatures. Identify the most specific group (the
group that contains the fewest number of species) listed below that this critter belongs
to.
a. Chordata
b. Craniata
c. Vertebrata
d. Gnathostomes
e. Osteichthys - Answers - c. Vertebrata
,Which of the following adaptations assisted tetrapods MOST in their colonization of
land?
a. Amniotic eggs
b. Pharyngeal silts
c. Ray-finned appendages
d. Cartilaginous vertebrae
e. Placenta - Answers - a. Amniotic eggs
Biologists generally only name groups that have a single common ancestor. "Animalia",
"Bilateria", and "Ecdysozoa" are all good examples. The terms used by non-
professionals certainly don't stick to this rule. "Fish" is a good example. Most people
would consider both sharks and salmon as fish. If we were to call everything that arose
from the common ancestor of sharks and salmon as "fish", which of the following would
also need to be known as a fish?
a. Starfish (an Echinoderm)
b. Jellyfish (a Cnidarian)
c. Turtles (a Reptile)
d. Hagfish (a myxini Craniate)
e. Lamprey (a Petromyzontid) - Answers - c. Turtles (a Reptile)
Lamprey are Vertebrates but not Gnathostomes because they...
a. have keratinous teeth.
b. have filter-feeding larvae.
c. lack vertebrae of calcified bone.
d. are parasitic.
e. are jawless. - Answers - e. are jawless.
Each of the answers below gives a different group of animals (in CAPS), a characteristic
that at least one member of the group has (in italics), and the evolutionary history of that
characteristic (derived or ancestral in parentheses). Choose the answer that correctly
matches the evolutionary history of the character for that group.
a. PRIMATES --> hairless faces (ancestral)
b. BILATERIA --> bilaterally symmetrical body plan (ancestral)
c. ANIMALIA --> HOX genes (derived)
d. EUMETAZOANS --> ecdysis (ancestral)
e. EUMETAZOANS --> tissues (derived) - Answers - b. BILATERIA --> bilaterally
symmetrical body plan (ancestral)
A marine biologist discovers a new deep-sea organism. Which of the following sets of
characteristics would tell you that the organism MUST be an animal. It is a/n...
a. multi-cellular, eukaryotic organism with chitin
b. multi-cellular, eukaryotic, diploid organism
c. organism with tissues and 2 primary embryonic layers
d. haploid organism with HOX genes that produces gametes
e. unicellular organism with collagen - Answers - c. organism with tissues and 2 primary
embryonic layers
, In animal development, which of the following processes results in the formation of an
endoderm and ectoderm layer?
a. Cleavage
b. Gastrulation
c. Fertilization
d. Mesodermal formation
e. The "eight-cell" stage - Answers - b. Gastrulation
Choose the correct matching of animal groups with their body symmetry.
a. Porifera = radial; Cnidaria = radial; Ecdysozoa = bilaterial
b. Porifera = assymetrical; Ctenophore = bilateral; Ecdysozoa = radial
c. Porifera = assymetrical; Lophotrochozoa = radial; Ecdysozoa = bilaterial
d. Porifera = assymetrical; Lophotrochozoa = bilaterial; Ecdysozoa = bilaterial
e. Ctenophore = assymetrical; Cnidaria = radial; Ecdysozoa = bilaterial - Answers - d.
Porifera = assymetrical; Lophotrochozoa = bilaterial; Ecdysozoa = bilaterial
The classification of the common housefly is:
Eukarya-Animalia-Arthropoda-Insecta-Diptera-Muscidae-Musca-domestica
While the classification of one bumblebee is:
Eukarya-Animalia-Arthropoda-Insecta-Hymenoptera-Apidae-Bombus-pensylvanicus
These two organisms are in different...
a. Domains.
b. Orders.
c. Classes.
d. Phyla.
e. Families - Answers - b. Orders.
Which of the following is true of the generic phylogenetic tree depicted below, where the
right end depicts most recent time.
a. Each node represents an actual time in history.
b. Group A and C are most closely related.
c. The common ancestor at the rightmost node existed more recently than the one to its
left.
d. Group C is likely the common ancestor of Groups A and B.
e. A and B represent one species. - Answers - c. The common ancestor at the rightmost
node existed more recently than the one to its left.
The traditional three- or five-Kingdom phylogenetic classifications of life has been
modified with a three-Domain system because...
a. unicellular organisms are either prokaryotic or eukaryotic.
b. Fungi, Animals, and Plants share a recent common ancestor.
c. Animals are more closely related to Archaea than to Plants.
d. There is no single common ancestor to life on the planet.
e. multicellular organisms are all eukaryotic. - Answers - a. unicellular organisms are
either prokaryotic or eukaryotic.
